In an article in the Journal of Advertising, Weinberger and Spotts compare the use of humor in television ads in the United States and the United Kingdom. They found that a substantially greater percentage of U.K. ads use humor. a. Suppose that a random sample of 400 television ads in the United Kingdom reveals that 142 of these ads use humor. Find a point estimate of and a 95 percent confidence interval for the proportion of all U.K. television ads that use humor. b. Suppose a random sample of 500 television ads in the United States reveals that 122 of these ads use humor. Find a point estimate of and a 95 percent confidence interval for the proportion of all U.S. television ads that use humor. c. Do the confidence intervals you computed in parts a and b suggest that a greater percentage of U.K. ads use humor? Explain.
In an article in the Journal of Advertising, Weinberger and Spotts compare the use of humor
in television ads in the United States and the United Kingdom. They found that a substantially
greater percentage of U.K. ads use humor.
a. Suppose that a random sample of 400 television ads in the United Kingdom reveals that
142 of these ads use humor. Find a point estimate of and a 95 percent confidence interval
for the proportion of all U.K. television ads that use humor.
b. Suppose a random sample of 500 television ads in the United States reveals that 122 of
these ads use humor. Find a point estimate of and a 95 percent confidence interval for the
proportion of all U.S. television ads that use humor.
c. Do the confidence intervals you computed in parts a and b suggest that a greater percentage
of U.K. ads use humor? Explain.
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What would the null and alternative hypotheses be, as well as the test statistic?
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